... together. The cause of one event may be described as a physical event in the brain and under another event, as a desire, emotion or thought. Substance dualism however has been largely dropped out of contemporary discussions. Few philosophers now find the idea of the soul immaterial coherent or productive. The philosopher who spoke most about dualism was René Descartes. He believed that everything non-physical, all feelings and sensations that can be described but cannot be located physically become part of your mind/soul. Descartes' dualism, known as Cartesian Dualism, rested on very certain ideas. He stated that the mind and body were two very different things and that all substances have a property of a special nature. For example, the property of the mind is consciousness 'whose whole essence is to think' and therefore takes up no space, whereas the properties of bodily or material substances are length, breath or depth ...

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